Auxiliary lift for road-working apparatus



Dec. 19, 1922.

G. DAVIS. AUXILIARY LIFT FOR ROAD WORKING APPARATUS.

VHLED SEPT. i4, 192:.

2 SHEETS-"SHEET I.

7 1 /mo-o o a o o o a u 0 Z 0 Il'lll J Dec. 19, 1922. 1,438,948.

v e. DAVIS. 1 a AUXILIARY LIFT'FOR ROAD WORKING APPARATUS.

FILED SEPT. H, I92]. 2 SHEETS-SHEET 2.

aggww- I/Al/l/li/ Patented Dec. 19, 1922.

* rice,

GARFIELD DAVIS, 0F SPOKANE, WASHINGTON.

To all whom it may 007L067?1-.'.

Be it known that I, GARFIELD DAVIS, a citizen of the United States ofAmerica, residing at Spokane, Spokane County, State of lVashington, haveinvented new and use- ,ful Improvements in Auxiliary Lifts for Roal-lVorking Apparatus, of wh ch the heavy and to a great extent unwieldy,cs-

pecially as pertains to the adjustment of the road contact tool orblade, and the object of this invention to provide an auxiliary lift toaid in the manual adjustment and manipulation of the road contact toolor blade. The invention consists in the application, for the purposesmentioned, of well known mechanical principles, whereby the weightrequired to be lifted by manual effort is greatly lightened and theprocess of adjustment is facilitated and the apparatus made wieldy andpractical.

The invention will be hereinafter particularly described, pointed out inthe claims and illustrated in the accompanying draw ings, whereinapplication of the invention is made to a road grader.

Figure 1 is a side elevation of a road grader with the invention appliedthereto.

Figure 2 is a partial rear end plan view of the grader, showing themeans for manual operation of the road contact tool or blade. the planon which thefigure is taken being indicated by line 2 in Fig. 1.

Figure is a sectional view taken on the line 3-3 of Figure 1.

e 1 is a side elevation of an enlarged he invention shown applied to thegrader, necessary connecting parts of the grader only being shown.

Figure 5 is a sectional. view taken on the line 5-5 of Figure 1, and

Figure 6 is a sectional view taken on the line 6-6 of Figure 4.

In the following detail description in which like nominals refer to likeparts throughout the several views, sufficient of arched supports 12.the shafts 18 insideof the standards 19 are Wheels 21 adapted. to bemanually AUXILIARY; LIFT FOB ROAD-WORKING APPARATUS;

Applicationfilecl September 14, 1921. Serial No."50 0,515.

the grader construction will be described to show theapplication of theinvention.

Front and rear trucks 10 and 11 respectively carry the frame of thegraderincluding the arched supports 12. Lift shafts 13 are rotatablymounted in bearings letand 15.

The ends of the lift shafts 13 adjacent the bearings 15 have rigidlysecured thereto gears 16, which mesh withworm gears 17 rigidly securedto shafts 18 rotatably mounted in standards 19, one on each side of aplatform 20, adjacent the ends of the Rigidly mounted on turned for theoperation of the lift shafts 13. The ends of the lift shafts 13 adjacentthe bearings 14 are bent to. rightangles thereby forming cranks 22,which i are pivotally attachedto downwardly extending lift rods-23, thelower. ends of which are secured to a cross bar 24:, carrying a steelcircle 25, from which is suspended. as by means of arms 26 and supports27, the scraper bar 28. A great weight is carried by the lift rods 23and in the required changes in the elevation of the scraper bar 28 inthepractical use. of the grader the operator, by means of the connectionsbetween the wheel 21 and the lift rods 23, must raise and lower the bar28. To lighten the work of the operator'in effecting these ad.-justments, the Il'lGGl'lflnlSIn hereafter de- .scribcd has beenprovided.

Loosely mounted on the lift shafts 13 are i isprings 30. On the liftshafts 13 near the outer ends of the sleeves 29 are secured as by thescrews 31, countersunk into the shafts 13, lugs 32, to which the outerends of the coil. springs 30 are secured. Loosely mounted on the liftshafts 13 near the inner ends of the sleeves are ratchet wheels cured tothe curved supports adjacent the ratchet wheels are arms 34 carryingravity pawls 35 adapted for engagement with the ratchet wheels Throughthe ratchet wheels extend openingsv 36 and in these openings 36the innerends of the coil springs 31) are secured. The longitudinal position ofthe ratchet wheels on. the lift shafts 13 is maintained by means ofcollars 37 engaging the shafts 13 and held in position by set screws 38.The coil springs attached to the ratchet wheels 33 as stated aid in thispositioning. The tension of the springs 30 is ad usted'bymeans'of theratchetv Wheel and pawl 35.

Cir

sion 'ont-he springs 30 which aids in the manual operation of liftingtheiscraper bar .111?PIOPOltIOIl"tO'lShEYSIZQ ancltension of the"springs 30-a-ri(l*these' springs may be of a sullicientstrength and.atlj'nste'cl to p'rovide -sifific'ient-te11sion to lift hyfar thegreater part of the load.

T 111 the class of: graders shown the "operator "takes a position on the"platform and "manually turns-the "wheels 21 whereby throughthe'connecti'onof the Worm gears 17, the gears} 16, shafts l3, cranksf22'and rods "23 the scrapeflhar 28' is adjusted, A

hexagon hea cl '83 is attacheclto the-ratchet Wvheel} '33, loy meuns ofwhich X a Wrench may be usedto: ttoljust the ratchet *Wheel 33.

What =is clain1e'cl is: 1. In road gradersyhawing a'"blade"or tooladapted for a =Wo1iking'-contact with the earth,a rotatable liftingshaft, connections "between the lifting shaft and the blade or tool:a-ncl manually operative means connected wlth the shaft, a sleeveloosely engaging the liftingislurtt, iwco'il' spring engaging the outersurface of the sleeve means rigidly *seculecl -to the shaft foranchoring one end of the spring and to which one end of the spring isanchored and means-on" the lifting shaft to which the other end of thecoil spring issecurecl, such means hei-ng aclj-u'stable tochangethe'tension of the spring.

2. In road, graders, havinga blade or tool "adapted for "a "Working*-'co11ta'ct wv-ith the "'earthya rotatable lifting shaft, connectlonsbetween the liftingsheft and the hl:-ttle"0r tool and manually operativemeans connectdetl' with the shafft asleeve' loosely engaging 4 theliftingshaft,-'a coil spring'enga'gi-ng the outer-surface'of the-sleeve,means in connection with the liftingshaft f0r-anchoring one end of thecoil springs to such shaft and means non-rotatable with the liftingshaft for anchoring the otheuendofthe coil spring, such 'ineans 'hei np"-adjustahle "to wcha-nge the tension of the-spring.

ln testnnony=Whereof, I afiix niy Slgnile ture.

GARFIELD DAVIS;

